Well, my jackplate main bolt is stripped, so the marina that tried to adjust it clamped the side bolts down to what the thought was about right. I thought about getting a hydraulic jackplate, but didn't pull the trigger yet. So, I'm still only getting 48-49 top end with it. I might play with it more over the wintertime.
so curt , your running a 18 ft with a 150hp. aluminum boat..at 55mph? and wanting more? i wish i had a copy or some pics of my friends old boat..folded in half....i love speed . i run at 63/65 mph in a 19f stratos vlo..150 merc. fiberglass...that aluminum is scary no thanks